$ git clone -n https://src.fedoraproject.org/rpms/falkon.git /var/lib/mock/f39-build-1736885-41280/root/chroot_tmpdir/scmroot/falkon
Cloning into '/var/lib/mock/f39-build-1736885-41280/root/chroot_tmpdir/scmroot/falkon'...
$ git fetch origin 0f629a5e69e0fcdaf95367d3910d6aff738fd022:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/falkon
 * [new ref]         0f629a5e69e0fcdaf95367d3910d6aff738fd022 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f629a5 23.08.3